Sometimes the servers have problems. It is likely that the Downloading work message is at the other end. Please try attaching to another project to see if it is at your end or the other end. BOINC is perfectly happy to be attached to more than one project.

No running tasks may be a side effect of the first message, or may be a side effect of the third message.

The third message is the one you can do something about. There is a setting that is available on both the web site under your account, or in the UI to allow CPU usage while you are active at the keyboard and mouse. Most computers under most circumstances will have no problem doing work between keystrokes. Please set this to allow. NOTE, there is a similar setting for GPUs. Most computers do not do well if the GPU is used while you are active at the mouse and keyboard. There is also a setting to stop BOINC processing work when the CPU is more than X% busy. The default is 25% which appears to be much too low a setting for most computers. I have mine set to 100%. Of course, YMMV on the these settings.BOINC WIKI

Thanks. I added Rosetta@home and woke up this morning to see that it is loading something, though my status is listed as "Suspended - computer in use." I presume that's OK since I am, after all, using my computer.

However, I'd really like to get the SETI@home working, and it says work done for this project 0.

If SETI eventually starts loading, how do I give it preference over Rosetta?

Screen savers have a habit of being resource hungry, you may have the level of CPU usage at which S@H drops out set too low, so the screen saver will stop itself running. Or you are trying to run S@H on a GPU in which case the screen saver won't run, but might give a spurious error message.Bob Smith
Member of Seti PIPPS (Pluto is a Planet Protest Society)
Somewhere in the (un)known Universe?